Fix comment in `pointer_events`

[ickshonpe]

Objective

Comment from bevy_picking::events::pointer_events:

                // Emit Click and Up events on all the previously hovered entities.

The event is named Release, not Up.

Solution

Replace Up with Release.

[mockersf]

well if you're changing things around there, could you replace the events with messages? 😄

[ickshonpe]

well if you're changing things around there, could you replace the events with messages? 😄

It dispatches both events and messages so it's confusing what to do, I guess it could say "events and messages"? The whole module just uses "event" as a blanket term to mean both events and messages though.